Most were minor, but others were more serious. In 2010, a Trans Northern pipeline leaked 90 thousand litres of gas into Oakville's Bronte Creek before it was noticed. The clean up continues to this day.

Many of the pipelines in the GTA are decades old. Trans Northern's, for instance, was built in 1952. They are routinely inspected, still an estimated 30 percent of leaks aren't detected by pipeline owners. Instead the public are the ones reporting them.

If you have any pipeline-related stories, please email us at pipelines@cbc.ca.

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